Journal of Pathology and Translational Medicine

A Case of Epithelioid Blue Nevus: Chung Hun Lee, Hye Sook Min, Eon Sub Park, Kye Yong Song; Korean J Pathol. 2014;48(6):434-437. Published online December 31, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.6.434

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A Curious Case of a Pigmented Lesion
Dilshad Sachedina, Marisa Taylor
Indian Journal of Dermatology.2024; 69(1): 104. CrossRef
Recurrence of a Cellular Blue Nevus with Satellitosis—A Diagnostic Pitfall with Clinical Consequences
Hermann Kneitz, Christian Rose, Valerie Glutsch, Matthias Goebeler
Dermatopathology.2022; 9(4): 361. CrossRef
Epithelioid Blue Nevus
Kai-Lv Sun, Jian-Min Chang
International Journal of Dermatology and Venereology.2020; 3(3): 186. CrossRef

Cytokeratin-Positive Gastrointestinal Stromal Tumor of Biphasic Morphology: A Case Report: Sung Sun Kim, Yoo Duk Choi, Jae Hyuk Lee, Chan Choi; Korean J Pathol. 2014;48(5):375-378. Published online October 27, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.5.375

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CYTOKERATINS: NOT AN EPITHELIAL ENTITY ANYMORE?
Geetpriya Kaur, Devicharan Shetty, Seema Sikka, Aparna Pathak
INTERNATIONAL JOURNAL OF SCIENTIFIC RESEARCH.2022; : 15. CrossRef
Gastrointestinal stromal tumors of the stomach in a 10-year-old child
Saeed Nasher, Fayed Al-Yousofy, Faisal Ahmed
Journal of Pediatric Surgery Case Reports.2021; 74: 102044. CrossRef

Diagnostic Features of Fine Needle Aspiration Cytology of Pleomorphic Adenoma, Adenoid Cystic Carcinoma, and Mucoepidermoid Carcinoma of Salivary Gland.: Eun Sook Nam, Won Bo Jo, Jung Ho Han, Insun Kim; Korean J Cytopathol. 1990;1(1):60-67.

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Abstract PDF: The evaluate the diagnostic findings of salivary gland tumors, we reexamined aspiration cytology smears of 7 cases of pleomorphic adenoma, 3 cases of adenoid cystic carcinoma, and 3 cases of mucoepidermoid carcinoma, performed during April 1986 to March 1990, which were comfurmed by surgical excision and histologic diagnosis. The results obtained are summarized as follows : 1. All cases of pleomorphic adenoma showed branching cellular clusters of epithelial and myoepithelial cells. Acellular elements including myxomatous and chondroid components were observed. There were no cellular pleomorphism and nucleoli. Keratinizing squamous epithelial cells and keratin pearls were noted. 2. The smears of adenoid cystic carcinoma showed cell balls or cell cords containing a central hyaline core. Nuclear atypism and the nucleoli were frequently observed. There were no keratinizing squamous epithelial cells. 3. The smears of mucoepidermoid carcinoma showed mainly sheets or clusters of intermediate cells and some mucin-producing cells. Some nuclear pleomorphism was observed. Mucinous material and many inflammatory cells were present in the background.

Mucoepidermoid Carcinoma of Tracheobronchial Tree: Clinicopathological Study of 31 Cases.: Sang Yun Ha, Joungho Han, Jae Jun Lee, Young Eun Kim, Yoon La Choi, Hong Kwan Kim; Korean J Pathol. 2011;45(2):175-181.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.2.175

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BACKGROUND
All aspects of mucoepidermoid carcinoma (MEC) of the lung including histologic grading, clinical behavior and its differentiation from adenosquamous cell carcinoma are still not fully understood.
METHODS
We reviewed the hematoxylin-eosin stained slides and medical records of 31 cases of MEC of the lungs. The cases were classified as low and high grade according to the quantitative grading system formulated for MEC. High grade tumors were tested for an epidermal growth factor receptor (EGFR) mutation.
RESULTS
Twenty eight cases were classified as low grade and 3 cases as high grade. Histologically, lower glandular component, cellular atypia, necrosis, mitoses >4/10 high power fields, and endolymphatic tumor emboli were typical characteristics of a high grade tumor. Although some tumors showed histologic features mimicking high grade tumors, they were classified as low grade tumors according to this quantitative grading system. Low grade tumors showed no recurrence or metastasis. However, among three patients with a high grade tumor, two had distant metastases and one died of disease. Additionally, an EGFR mutation was not detected.
CONCLUSIONS
A high grade MEC was consistently different from a low grade tumor with regard to malignant histologic features and poor prognosis. Therefore, correct histologic grading is important in predicting the prognosis to avoid unnecessary treatment.

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Ge Zhao, Oliver Chang, John Streidl, Amit Bhrany, Kyle Garton, Timothy H. McCalmont, Paul E. Swanson, Zsolt Argenyi, Michi M. Shinohara
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Boram Lee, Taebum Lee, Se-Hoon Lee, Yoon-La Choi, Joungho Han
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Metastatic Pulmonary Mucoepidermoid Carcinoma with Fulminant Clinical Course
Yong Won Park, Seon Bin Yoon, Mi Ju Cheon, Young Min Koh, Hyeon Sik Oh, Se Joong Kim, Seung Hyeun Lee
The Ewha Medical Journal.2015; 38(2): 85. CrossRef
Lung cancer in never-smoker Asian females is driven by oncogenic mutations, most often involving EGFR
Sang Yun Ha, So-Jung Choi, Jong Ho Cho, Hye Joo Choi, Jinseon Lee, Kyungsoo Jung, Darry Irwin, Xiao Liu, Maruja E. Lira, Mao Mao, Hong Kwan Kim, Yong Soo Choi, Young Mog Shim, Woong Yang Park, Yoon-La Choi, Jhingook Kim
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Hairy Polyp of Soft Palate in an Infant.: Kyeongmee Park, Yeonmee Kim, Hoonyoung Woo; Korean J Pathol. 1998;32(12):1101-1103.

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Abstract: Hairy polyp is an uncommon lesion of the nasopharynx and oropharynx. It is most frequently seen as a pedunculated mass at birth or in the first year of life. It generally has been classified as dermoid derived from the ectoderm and mesoderm. The symptoms depend on the size and location of the lesion. We report the clinico-pathological features of a hairy polyp arising from the right nasopharyngeal side of soft palate in a 21-day-old girl. Grossly, a well demarcated brownish yellow solid mass, measuring 2.7x1.5x1.2 cm, showed fine hairs on the surface. The cut surface was a yellowish brown solid appearance. Microscopically, it was covered with keratinizing squamous epithelium and was composed of mature adipose tissue, skeletal muscle, a few peripheral nerve bundles, and blood vessels in the center and mature pilosebaceous units in the periphery. Knowledge of this type of malformation facilitates early intervention and avoids significant morbidity.

Epidermoid Cyst of the Sole: A report of two cases positive for human papillomavirus.: Eun Joo Seo, Hi Jeong Kwon, Ki Ouk Min, Hyun Jeong Lee, Byung Kee Kim; Korean J Pathol. 2000;34(12):1025-1028.

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Abstract PDF: Epidermoid cysts occur rarely on the palms and soles, where hair is not present. These cysts have long been assumed to arise from traumatic implantation of epidermal fragment, but the pathogenesis is still controversial. Recently, with microscopic findings, immunohistochemical features, and molecular studies, the epidermoid cysts of the sole may be induced by the human papillomavirus. We report two cases of epidermoid cysts of the sole with the discussion of the pathogenesis.

Fine Needle Aspiration Cytology of Mucoepidermoid Carcinoma of the Lung: A Case Report.: Soon Won Hong, Kwang Gil Lee; Korean J Cytopathol. 1990;1(2):170-174.

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Abstract PDF: The mucoepidermoid carcinoma is a rare tumor in the lung. A case of bronchial mucoepidermoid carcinoma diagnosed by fine needle aspiration cytology is presented. The smear showed many intermediate cells with occasional mucus-secreting cells. Malignant squamous cells were not present. The cellular arrangement of intermediate cells was overlapping and grouped in ball-like fashion. These cytologic features are unique for diagnosis of this tumor.

Cytopathology of Metastatic Mucoepidermoid Carcioma of the Lung.: Weon Seo Park, Eui Keun Ham; Korean J Cytopathol. 1994;5(2):180-183.

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Abstract PDF: A case of metastatic mucoepidermoid carcinoma of the lung, originating from the hard palate, was diagnosed by sputum and bronchial washing cytology. Although the cytologic features of mucoepidermoid carcinoma have been well described, it is easy to confuse mucoepidermoid carcinoma with the more common primary adenocarcinoma or squamous cell carcinoma of the lung. The features distinguishing mucoepidermoid carcinoma from other primary neoplasms includ 1) mucus-secreting cells individually and in clusters admixed with other cell components, 2) epidermoid cells identified by the presence of abundant spread-out cytoplasm and an oval dark nucleus and 3) intermediate cells resembiling normal ductal epithelial cells with moderate-toscanty cytoplasm, a central, round vesicular nucleus and a prominent nucleolus, The morphologic features of metastatic mucoepidermoid carcinoma in the case were similar to those of primary sallvary mucoepidermoid carcinoma.

Fine Needle Aspiration Cytology of Unusual Epidermoid Cyst with Diffuse Parakeratosis and Aggressive Growth: A Case Report.: Hae Joo Nam; Korean J Cytopathol. 1999;10(1):85-89.

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Abstract PDF: An extremely unusual case of epidermoid cyst showing diffuse parakeratosis and aggressive clinical behavior is presented. A destructive bone lesion with surrounding ill-defined soft tissue lesion was found by computed tomography in a 63 year-old man complaining of painful swelling of the right buttock. He had a history of surgical excision twice for epidermoid cysts of soft tissue of the right hip during recent one year. On aspiration cytology, the aspirate was highly cellular and mostly composed of desquamated nucleated squamous cells. Operation finding revealed that the iliac bone was irregularly destroyed and filled with gray-white cheesy material and necrotic bone debris. Adjacent gluteus muscle showed scattered gray-white lesions. The curettage specimen showed bone necrosis and desquamated squamous cells filling the marrow spaces. The lesion within muscle revealed epidermoid cyst with diffuse parakeratosis.

Fine Needle Aspiration Cytology of Mucoepidermoid Carcinoma of the Peripheral Lung: A Case Report.: Min Sung Choi, So Young Jin, Dong Won Kim, Dong Wha Lee; Korean J Cytopathol. 2005;16(1):36-40.

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Abstract PDF: The mucoepidermoid carcinoma is a rare tumor in the lung for less than 1% of all pulmonary neoplasm. It is mostly presented as a solitary pulmonary nodule at a large bronchial tree on bronchoscope. But more peripheral located tumor that not accessible to the bronchoscope are rarely reported on literature. The cytologic findings of these tumors are discribed as a mixture of squamous cells, mucous cells, and intermediate cells with overlapped cellular clusters. We experienced a case of peripheral mucoepidermoid carcinoma of lung diagnosed by fine needle aspiration cytology. The smear showed many cellular clusters on mucoid background. They consisted of many intermediate cells with occasional mucus-secreting cells, but malignant squamous cells were not present.

Hybrid Cyst Coexisting with Glomus Coccygeum.: Hyun Soo Kim, Gou Young Kim, Sung Jig Lim, Youn Wha Kim; Korean J Pathol. 2008;42(5):323-326.

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Abstract PDF: A 36-year-old female patient with a mass in the coccygeal region underwent surgical removal of the mass, and this revealed a hybrid cyst in coexistence with a glomus coccygeum. This unusual cutaneous cyst had an epithelial lining composed of keratinizing, stratified squamous epithelium with an intact granular layer immediately adjacent to apocrine cells, and the apocrine cells showed the characteristic features of "decapitation secretion". The glomus coccygeum, which is a minor finding in specimens from the sacral area and it may represent a diagnostic challenge to the unaware observer, was incidentally identified in the dermis. The glomus coccygeum was located beneath the epithelial transition area of the hybrid cyst. Immunohistochemical analysis revealed that the cytoplasm of the epithelioid glomus cells was positive for smooth muscle actin, and these epithelioid glomus cells were arranged in concentric layers around blood vessels, and the cellular stroma surrounding the glomus bodies were positive for S-100 protein.

Sclerosing Mucoepidermoid Carcinoma of the Parotid Gland: A Case Report.: Hyunchul Kim, Ju Han Lee, Eung Seok Lee, Soon Young Kwon, Taik Kun Kim, Young Sik Kim; Korean J Pathol. 2007;41(3):193-197.

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Abstract PDF: Sclerosing mucoepidermoid carcinoma (SMEC) is a very rare tumor of the salivary gland. There have been eight cases of SMEC reported in the medical literature; this is the first reported case in Korea. A 51-year-old woman presented with a right infra-auricular mass that she had for 3 years. We performed superficial parotidectomy. Grossly, the resected parotid gland showed a well-circumscribed firm mass. Histologically, the tumor consisted of central solid or ductal tumor nests within a dense fibrous stroma surrounded by peripheral lymphoid infiltration. The tumor nests were composed of squamous, intermediate and mucin-secreting cells. However, the tumor cells lacked mitosis and nuclear anaplasia. The lymphoid cells were mostly composed of lymphocytes and plasma cells with occasional eosinophils and neutrophils. Immunohistochemically, the tumor cells were positive for high- and low- molecular weight cytokeratins, cytokeratin 7, p16INK4A, Bcl-2 and cyclin D1. The patient also underwent radiation therapy. We report here on a case of SMEC of the parotid gland along with the immunohistochemical characteristics, and we review the relevant literature.

Epidermoid Cyst in the Kidney with Nephrolithiasis: A Case Report.: Changyoung Yoo, Yeong Jin Choi, Kyoyoung Lee, Sang In Shim, Chang Suk Kang; Korean J Pathol. 2005;39(5):348-350.

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Abstract PDF: Epidermoid cysts in the kidney have rarely been reported, and in most cases its pathogenesis has not been well understood. We report a case of an epidermoid cyst in a kidney with nephrolithiasis in a 61-year-old man. A pyelonephrolithotomy was performed on the patient four years ago to treat nephrolithiasis of the left kidney. During the follow-up, a newly developed mass was discovered three years ago and the mass has recently increased in size. A unilateral nephrectomy was performed under the clinical impression of renal cell carcinoma. Gross examination revealed a well encapsulated cystic mass measuring 3.0 x 2.0 x 2.0 cm and containing lumps of soft whitish material, in the upper pole of the left kidney. This location was the same as that of previous nephrolithiasis. Microscopic examination revealed typical findings of an epidermoid cyst. We suspect that the chronic irritation induced by renal stones may be associated with the development of the epidermoid cyst in this case.

Ceruminous Gland Tumors: 5 cases report.: Yun Kyung Kang, Je G Chi; Korean J Pathol. 1994;28(4):414-419.

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Abstract PDF: Tumors of the ceruminous gland are rare. However, careful histologic evaluation and classification are necessary for the proper treatment and ultimate prognosis. We present 5 cases of ceruminous gland tumors. Case l (73/M) and case 2 (52/M) were adenoid cystic carcinoma. They presented with protuding masses in the left external auditory canal for several months. Case 3 (76/M) was a mucoepidermoid carcinoma of auditory canal, who presented with right ear swelling. The mass recurred 3 years after the surgical resection and combined radiation therapy. Case 4 (60/F) and case 5 (2l/F) were ceruminous adenoma, which showed diffuse or focal areas of glandular structures with one-or two-layer of eosinophilic columnar to cuboidal cells and sometimes with myoepithelial cells. These tumors showed non-infil-trative growth pattern and lack of mitosis, and had no capsule.

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